A239520 Prime powers (A025475) such that the distance to the nearest prime power is a triangular number (A000217).

1, 4, 8, 9, 49, 64, 125, 128, 2187, 2197, 654481, 657721, 1442401, 1442897, 1708249, 7252249, 7946761, 13053769, 13082689, 21557449, 39677401, 39702601, 86136961, 86174089, 106729561, 106770889, 184063489, 253987969, 302516449, 626550961, 626651089, 844425481

Offset

1,2

Links

Table of n, a(n) for n=1..32.

Crossrefs

Cf. A000217, A025475, A239521, A239522, A239523.

Sequence in context: A237607 A035132 A077572 * A083807 A098128 A217700

Adjacent sequences: A239517 A239518 A239519 * A239521 A239522 A239523

Keyword

nonn

Author

Alex Ratushnyak, Mar 20 2014

Status

approved